Carbonyl derivative of alpha naphthol and process of making the same



--Patented M 21,1925.

GUIIaE-A E DE MONTMOLLIN D J'OSEF SHELEB, OF BASED, SWITZERLAND, AS- SIGNO TEE SOCIETY OF CHEMICAL. INDUSTRY IN B ASLE, OF BASEL, SWITZER- LAND.

CABBONYL I)EItllIVA.'I."I[VIE OI? ALPHA NAPHTEOL AND PROCESS OF MAKING .'.'I. HE

lt'o Drawing.

To all whom it may concern Be it known that we, GUILLAUME on MONT- MOLLIN and Josnr Srmrm, both citizens of which constitutes nearly unoolored crystals melting of caustic alkalies and of alkali carbonates with yellow coloration, and which can be isolated from the reaction mass owing to'its solubility in the organic solvents and its behaviour toward bases andacids. This new product can be employed for the manufacture of dyestuffs and of intermediate dyestuffs.

144 parts of alphanaphthol are dissolved in a mixture of 400 caustic soda of 40% and of 1200 parts of ethyl alcohol. Then there are added 154 parts of copper several. ours, while coolin wder and the whole is stirred for in such amannor that the temperature 0 the-mass of reaction does. not rise over C.

. achievement of the reaction, the intense "blue-green liquid is widified with a mineral found that when the above there is obtained benew car-- at 243 C. and dissolves in solution products' for the manufacture of parts of a solution of g signed our names carbon tetrachloride and 1 part of After the.

Application filed April 10, 1923. Serial No. 681,192.

acid, the inorganic salts precipitated are filtered off, and the alcohol is-distilled off.

The residue thus obtained is digested with v a hot dilute solution; of sodium carbonate and the liquid is decanted afteroooling, and out of the solution thus obtained, the 4,4- dihydroxy-1,1'-dinaphthylketone is isolated by acidifying. Itis-purified by dissolution in Iglacial acetic acid.

is' also advantageous to use amyl alcohol in' lace of ethyl alcohol. a

hat we claim is 1. The herein describ manufacture of a new carbonyl derivative of al hanaphthol,. the 4,4-dihydroxy-1,1- dinap thylketone of the forum a:

I no I g on,

I consisting in reacting with "a tetrahalogen hanaphthol in derivative of methane on al of neutralizresence of substances ca ab e in acids and of an alip taming fromtwo to five atoms of carbon.-

2. As a. new article of-manufacture the herein described 4,4-dihydroxy-1,1'-d1naph thylketone constitut' g nearly uncolored crystals melting at 243 C. disso v1 In witness whereof we have hereunto. this 26th day-of March 1923, in the presence of two-subscribing witon MQNTMOLLIN. JOSEF'SPIELEB. t v

atic alcohol conn in solu-- tions of caustic alkalies and of a a-li car-.

ed pro oess for the 

